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Jochen Büttnerty with oxygen, in nature Si always exists as silica (Si dioxide) or silicates which are combined with various metals. Si dioxide comprises about 60% of the earth’s crust. In soil, Si dioxide accounts for more than 50% and Si concentration in soil solution is between 3.5 and 40 mg Si L-1 in the formCostume 发表于 2025-3-23 18:40:36
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Boston Studies in the Philosophy and History of Sciencehttp://image.papertrans.cn/t/image/883737.jpg忙碌 发表于 2025-3-24 07:56:59
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